ES2612128T3 - Grapadora quirúrgica con articulación universal y sujeción previa de tejidos - Google Patents

Grapadora quirúrgica con articulación universal y sujeción previa de tejidos Download PDF

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ES2612128T3
ES2612128T3 ES10007933.4T ES10007933T ES2612128T3 ES 2612128 T3 ES2612128 T3 ES 2612128T3 ES 10007933 T ES10007933 T ES 10007933T ES 2612128 T3 ES2612128 T3 ES 2612128T3
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assembly
anvil
tissue
patm
cartridge
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Lee Ann Olson
Ralph A. Stearns
Clifford L. Emmons
Phillip Roy
John W. Beardsley
David D. Racenet
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Covidien LP
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • A61B2017/07278Stapler heads characterised by its sled or its staple holder
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • A61B2017/07285Stapler heads characterised by its cutter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2927Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2927Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
    • A61B2017/2929Details of heads or jaws the angular position of the head being adjustable with respect to the shaft with a head rotatable about the longitudinal axis of the shaft
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2932Transmission of forces to jaw members
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2932Transmission of forces to jaw members
    • A61B2017/2939Details of linkages or pivot points
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32Surgical cutting instruments
    • A61B17/320016Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes
    • A61B17/32002Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes with continuously rotating, oscillating or reciprocating cutting instruments
    • A61B2017/320024Morcellators, e.g. having a hollow cutting tube with an annular cutter for morcellating and removing tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32Surgical cutting instruments
    • A61B2017/320052Guides for cutting instruments

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

Una grapadora quirúrgica que comprende: un conjunto de herramienta (100), en donde el conjunto de herramienta comprende: un conjunto de cartucho (200) que transporta una pluralidad de grapas; un conjunto de canal (120) que soporta el conjunto de cartucho en el mismo; un conjunto de yunque (110) dimensionado para deformar dicha pluralidad de grapas expulsadas desde dicho conjunto de cartucho contra el mismo; un patín (160) movible a través de dicho conjunto de cartucho (200), dicho patín que tiene cuñas de levas (161a, 161b) para forzar a dicha pluralidad de grapas de dicho cartucho de grapas a través del tejido y contra dicho yunque para grapar el tejido dispuesto entre dicho yunque y dicho cartucho de grapas cuando dicho patín se mueve a través de dicho conjunto de cartucho desde una primera posición a una segunda posición; y un miembro de sujeción dinámico (150) movible con dicho patín a través de dicho conjunto de canal y dicho conjunto de yunque, dicho miembro de sujeción dinámico que tiene una parte superior (157) que tiene una superficie de leva superior (159) que se acopla de manera deslizante a dicho yunque y una parte inferior que tiene una superficie de leva inferior (152) que se acopla de manera deslizante a dicho conjunto de canal, dichas superficies de leva superior e inferior que están sustancialmente opuestas para oponer las fuerzas expansivas asociadas con la sujeción y el grapado del tejido y para mantener un hueco sustancialmente uniforme entre las superficies de contacto con el tejido de dicho conjunto de yunque y dicho conjunto de cartucho durante el grapado, caracterizada por que dicho patín (160) tiene una base con una ranura (167) que se extiende a través de la misma, dicho miembro de sujeción (150) que se asegura a dicho patín (160) a través de dicha ranura (167) que se extiende a través de la base del patín.

Description

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DESCRIPCION
Grapadora quirurgica con articulacion universal y sujecion previa de tejidos
Antecedentes
Campo tecnico
Esta solicitud se refiere a un aparato de grapado quirurgico, y mas concretamente, a un aparato de grapado quirurgico endoscopico articulado que aplica secuencialmente una pluralidad de cierres quirurgicos al tejido del cuerpo y mas tarde incide el tejido fijado.
Antecedentes de la tecnica relacionada
Los dispositivos quirurgicos en los que el tejido primero se agarra o sujeta entre la estructura de mordazas opuestas y luego se une mediante cierres quirurgicos son bien conocidos en la tecnica. Tfpicamente, se emplea una cuchilla despues de que el tejido se fija para cortar el tejido a lo largo de un camino de corte preferente. Los cierres tfpicamente son en forma de grapas quirurgicas pero tambien se pueden utilizar otros tipos de cierres para lograr el mismo proposito o similar.
Los instrumentos para este proposito pueden incluir dos miembros alargados los cuales se usan respectivamente para capturar o afianzar el tejido. Tfpicamente, uno de los miembros trasporta un cartucho de grapas el cual aloja una pluralidad de grapas dispuestas en al menos dos filas laterales mientras que el otro miembro tiene un yunque que define una superficie para dar forma a las patas de la grapa segun las grapas se dirigen desde el cartucho de grapas. Generalmente, la operacion de grapado se efectua por barras de leva o patines de arrastre que tienen superficies de leva que se desplazan longitudinalmente a traves del cartucho de grapas y los empujadores de grapas que expulsan secuencialmente las grapas desde el cartucho de grapas. Tfpicamente, una cuchilla viaja entre las filas de grapas para cortar y/o abrir longitudinalmente el tejido grapado entre las filas de grapas formadas.
Uno de los problemas asociados con los disenos de grapadora anteriores es la tendencia del miembro de sujecion dinamico de sesgar o pandear segun pasa a traves del tejido debido a las grandes fuerzas generadas durante el grapado y corte del tejido. Por ejemplo, los disenos del miembro de sujecion dinamico anteriores que transportan la cuchilla o superficie de corte proporcionan disenos tipo cantilever que se disenan para apretar de manera efectiva el tejido delante de la hoja de la cuchilla y la grapa que forma el patm de arrastre para forzar fluidos desde el tejido lo cual mejora el grapado del tejido y contribuye a una grapa de tejido con exito. No obstante, las grandes fuerzas requeridas para grapar e incidir el tejido tienden a situar tensiones indebidas en el diseno de la cuchilla cantilever lo cual puede provocar que la cuchilla se sesgue o pandee durante la transaccion que requiere a menudo al cirujano disparar la grapadora muy lentamente a traves de las estructuras de tejido mas grandes para evitar la posibilidad de que la cuchilla se desplace fuera de la lmea.
Es un objeto de esta revelacion proporcionar una grapadora quirurgica que tiene un actuador, preferentemente, un miembro de sujecion dinamico que mejora el grapado del tejido forzando a los fluidos fuera del tejido afianzado antes de expulsar el grapado en y grapar el tejido. Otro objeto de esta revelacion es proporcionar un miembro de sujecion dinamico que aplica presion de sujecion considerablemente tras el conjunto de cartucho y el yunque del miembro de herramienta de una grapadora quirurgica segun se traslada el miembro de sujecion dinamico a lo largo y a traves del conjunto de herramienta.
Otro objeto de esta revelacion es proporcionar un miembro de sujecion dinamico que ayude a proporcionar un hueco de tejido uniforme entre las superficies de contacto del tejido de un yunque y un cartucho de grapas en el area inmediata de y durante la formacion de la grapa y el cierre del tejido secuencial, progresivo, asf como en el area de y durante el corte del tejido, si el corte esta siendo realizado.
El documento US-A-5.651.491 describe una grapadora quirurgica que comprende un patm de actuacion que incluye un par de cunas de leva que tienen un vastago vertical que soporta una hoja de cuchilla.
El documento EP-A-0552050 describe una grapadora quirurgica que tiene un bloque de cuna y una cuchilla que se accionan a lo largo de una varilla roscada.
El documento EP-A-0705570 y el documento US-A-5653374 describen una grapadora quirurgica que tiene barras de leva alargadas que se hacen avanzar para accionar las grapas de un cartucho de grapadora.
El documento US-A-5865361 describe una grapadora quirurgica que tiene un patm en forma de cuna y un miembro de sujecion dinamico segun la parte de caracterizacion previa de la reivindicacion 1.
El documento US-A-20020143346 describe una grapadora quirurgica que tiene un miembro de sujecion dinamico, en donde el miembro de sujecion dinamico puede comprender una superficie de tipo cuna para accionar las grapas en el tejido.
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Compendio
La presente invencion proporciona una grapadora quirurgica que comprende: un conjunto de herramienta, en donde el conjunto de herramienta comprende: un conjunto de cartucho que transporta una pluralidad de grapas; un conjunto de canal que soporta el conjunto de cartucho en el mismo; un conjunto de yunque dimensionado para deformar dicha pluralidad de grapas expulsadas de dicho conjunto de cartucho contra el mismo; un patm movible a traves de dicho conjunto de cartucho, dicho patm que tiene cunas de levas para forzar dicha pluralidad de grapas desde dicho cartucho de grapas a traves del tejido y contra dicho yunque para grapar el tejido dispuesto entre dicho yunque y dicho cartucho de grapas cuando dicho patm se mueve a traves de dicho conjunto de cartucho desde una primera posicion a una segunda posicion; y un miembro de sujecion dinamico movible con dicho patm a traves de dicho conjunto de canal y dicho conjunto de yunque, dicho miembro de sujecion dinamico que tiene una parte superior que tiene una superficie de leva superior que se acopla de manera deslizable a dicho yunque y una parte inferior que tiene una superficie de leva inferior que se acopla de manera deslizable a dicho conjunto de canal, dichas superficies de leva superior e inferior que estan sustancialmente opuestas para oponerse a las fuerzas expansivas asociadas con la sujecion y el grapado del tejido y para mantener un hueco sustancialmente uniforme entre las superficies de contacto con el tejido de dicho conjunto de yunque y dicho conjunto de cartucho durante el grapado, caracterizada por que dicho patm tiene una base con una ranura que se extiende a traves de la misma, dicho miembro de sujecion que se asegura a dicho patm a traves de dicha ranura que se extiende a traves de la base del patm.
Adecuadamente, el miembro de sujecion dinamico comprende un soporte central y la parte inferior esta formada como un reborde inferior en forma de T. Adecuadamente, en estas realizaciones el soporte central tiene un borde de ataque de corte. Mas adecuadamente, el borde de corte esta sustancialmente alineado con la superficie de leva superior y la superficie de leva inferior.
Adecuadamente, el conjunto de yunque esta hecho de un material de calibre pesado.
Adecuadamente, el conjunto de herramienta comprende ademas un collar de sujecion movil que se desvfa contra una superficie de leva en dicho conjunto de yunque para cerrar dicho conjunto de yunque respecto a dicho conjunto de cartucho para sujetar el tejido entre los mismos.
Adecuadamente, el conjunto de yunque incluye una ranura en forma de T y la superficie de leva superior del miembro de sujecion dinamico se traslada de manera deslizable dentro de dicha ranura en forma de T.
Breve descripcion de los dibujos
Varias realizaciones del instrumento del asunto se describen aqrn dentro con referencia a los dibujo en los que:
La FIG. 1A es una vista en perspectiva de una grapadora quirurgica para usar con un conjunto de herramienta de acuerdo con la presente revelacion;
La FIG. 1B es una vista en perspectiva del conjunto de herramienta de la grapadora quirurgica de acuerdo con la presente revelacion;
La FIG. 2 es una vista de despiece del conjunto de herramienta de la FIG. 1;
La FIG. 3 es una seccion transversal derecha, en perspectiva del conjunto de herramienta de la FIG. 1 que muestra los componentes internos del mismo;
La FIG. 4 es una vista de seccion transversal izquierda, lateral, parcial que muestra un miembro de sujecion dinamico de acuerdo con la presente revelacion;
La FIG. 5 es una vista superior, en perspectiva que muestra un yunque para formar una serie de cierres quirurgicos de acuerdo con la presente revelacion;
La FIG. 6A es una vista lateral, en perspectiva de un conjunto de canal para soportar un cartucho de grapas de acuerdo con la presente revelacion;
La FIG. 6B es una vista superior, en perspectiva del conjunto de canal de la FIG. 6A;
La FIG. 7A es una vista lateral, en perspectiva de un patm de arrastre para soportar el miembro de sujecion dinamico de acuerdo con la presente revelacion;
La FIG. 7B es una vista superior, en perspectiva del patm de arrastre de la FIG. 7A;
La FIG. 7C es una vista en perspectiva que muestra el miembro de sujecion dinamico dispuesto dentro de patm de arrastre;
La FIG. 8 es una vista lateral, en perspectiva de un bloque de giro que monta el conjunto de herramienta con un eje
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de la grapadora quirurgica para permitir la articulacion del conjunto de herramienta en relacion con el eje;
La FIG. 9 es una vista lateral, en perspectiva de un adaptador para montar el bloque de giro al eje de la grapadora quirurgica;
La FIG. 10 es una vista lateral, en perspectiva del miembro de sujecion dinamico de acuerdo con la presente revelacion;
La FIG. 11A es una vista frontal en perspectiva de un extremo distal de un cartucho de grapas para usar de acuerdo con la presente revelacion;
La FIG. 11B es una vista lateral, de seccion transversal del conjunto de herramienta mostrado en la FIG. 1B y el conjunto de cartucho mostrado en la FIG. 11A;
La FIG. 11C es una vista en perspectiva del fondo con partes separadas del conjunto de cartucho de la FIG. 11A;
La FIG. 11D muestra una vista alargada de la relacion cooperativa entre el patm de arrastre, los cierres quirurgicos y una pluralidad de empujadores de grapas los cuales forman parte del cartucho de grapas de las FIG. 11A-11C;
La FIG. 12 es una ilustracion esquematica de un sistema de accionamiento tipo polea para avanzar el patm de arrastre a traves del tejido;
La FIG. 13 es una vista esquematica de seccion transversal lateral que muestra un mecanismo de accionamiento posible para accionar una sujecion para comprimir y cortar el tejido;
La FIG. 14 es una vista en perspectiva de un diseno del miembro de sujecion dinamico alternativo de acuerdo con la presente revelacion.
Descripcion detallada
La FIG. 1A muestra una grapadora quirurgica, generalmente designada 1, para uso en diversos procedimientos quirurgicos abiertos, endoscopicos o laparoscopicos. La grapadora 1 incluye un alojamiento 3 que tiene los extremos distal y proximal 4 y 6, respectivamente, un eje alargado 20 montado al alojamiento 3, preferentemente con su extremo distal 4, y un conjunto de mango generalmente designado 5. El eje 20 tiene un extremo distal 20a al cual se une operativamente mediante el mecanismo de fijacion 20b a una unidad de carga desechable 10. Como tambien se muestra en la FIG. 1B, la unidad de carga desechable (DLU) 10 esta compuesta de un conjunto de herramienta 100 y una parte de conector de eje 20c que se une giratoriamente y operativamente una con otra a traves de un mecanismo conector C. La parte de conector de eje 20c se une de manera extrafble operativamente al extremo proximal 24 del extremo distal 20a del eje 20.
Esta dentro del alcance de esta revelacion que el conjunto de herramienta 100 se pueda unir giratoriamente, operativamente, integralmente, por ejemplo, a traves de un mecanismo de conexion tal como C permanentemente y directamente al extremo distal 20a del eje 20 de una grapadora quirurgica desechable. Como es conocido, una unidad de carga desechable usada o gastada 10 se puede retirar del eje 20 de una grapadora quirurgica abierta endoscopica o laparoscopica, reutilizable o de numero de usos limitado, y sustituir con una unidad desechable no usada. Se contempla que el eje 20 con o sin una unidad de carga desechable unida integral o extrafblemente pueda ser extrafble selectivamente del alojamiento 3.
La parte de conector de eje 20 incluye un extremo proximal 24 y un extremo distal 22. Como se menciono anteriormente, el extremo proximal 24 puede estar asociado permanentemente o de manera extrafble con un mango u otros conjuntos de accionamiento de una grapadora quirurgica endoscopica o abierta 1 (o sistema no mostrado) operada manualmente (o sistema no mostrado). El extremo distal 22 de la parte de conector de eje 20 esta conectado operativamente al conjunto de herramienta 100. El conjunto de herramienta 100, en general, incluye un conjunto de canal del cartucho 120, un conjunto de yunque 110 y un conjunto de cartucho de grapas 200. El conjunto de herramienta 100 tambien incluye un accionador, preferentemente un miembro de sujecion dinamico 150, un patm de arrastre 160, asf como empujadores de grapas 228 y grapas 350 una vez que un cartucho no gastado o no usado 200 esta en o se monta en el conjunto de canal 120.
En los dibujos y en las descripciones que siguen, el termino “proximal”, como es tradicional, se referira por ejemplo al extremo del conjunto de herramienta 100 que esta mas proximo al usuario, mientras que el termino “distal” se referira al extremo que esta mas lejos del usuario.
La parte de conector de eje 20c es preferentemente cilmdrica y define un canal interno 25 en el extremo distal 22 del mismo y el cual esta dimensionado para recibir un adaptador de tubo o adaptador 40 el cual se describira en mas detalle con respecto a la FIG. 9 mas adelante. La parte de conector de eje 20c tambien recibe o aloja accionadores para accionar el conjunto de herramienta 100. Como se muestra mejor en las FIG. 1A, 1B, 2 y 9, el conjunto de herramienta 100 se monta al extremo distal 22 del conector de eje 20c (o el extremo distal 20a del eje 20).
Mas concretamente, el conjunto de herramienta 100 se monta sobre el adaptador de tubo 40 el cual incluye una
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superficie cilmdrica exterior 47 que se recibe deslizablemente en enganche de ajuste de friccion y se une al alojamiento interno 25 del conector de eje 20c (o, de nuevo, al eje 20). Aqu dentro, la descripcion de la conexion proximal o fijacion del conjunto de herramienta 100 al conector de eje 20c tambien aplica a su conexion al eje 20. Preferentemente, la superficie exterior 47 del adaptador de tubo 40 incluye al menos una interfaz mecanica, por ejemplo, un recorte o muesca 45, que se acopla con una interfaz mecanica correspondiente, por ejemplo, un saliente o tope que se extiende interiormente de forma radial (no se muestra), dispuesto en la periferia interior del alojamiento interno 25 para bloquear el adaptador de tubo 40 con el conector de eje 20c. Como resultado, la rotacion del eje 20 alrededor de un eje “X” definida con respecto al conjunto de herramienta 100 (Ver la FIG. 3) gira de la misma manera el conjunto de herramienta 100 en la misma direccion.
Como se muestra mejor en las FIG. 1B, 3, 4, 8 y 9, el extremo distal del adaptador de tubo 40 incluye un par de pestanas opuestas 42a y 42b las cuales definen una cavidad 41 para recibir giratoriamente un bloque de giro 50 allf dentro. Mas concretamente, cada pestana 42a y 42b incluye una apertura 44a y 44b (FIG. 8) definidas allf dentro que recibe el pasador de giro 57 (FIG. 4) tambien recibido en las aperturas 52a, 52b del bloque de giro 50 para permitir el movimiento giratorio del bloque de giro 50 alrededor de un eje “Z” definido como perpendicular al eje longitudinal “X” del conjunto de herramienta 100 (Ver las FIG. 3 y 8).
Como se explica en mas detalle mas adelante en la descripcion del conjunto de canal 120, el extremo proximal de cada pestana que se extiende hacia arriba 121a y 121b del conjunto de canal 120 incluye un par de aperturas 122a y 122b dispuestas a traves del mismo las cuales se dimensionan para recibir un pasador de giro 59 (FIG. 6A). A su vez, el pasador de giro 59 se monta a traves las aperturas 53a, 53b del bloque de giro 50 para permitir la rotacion del conjunto de herramienta 100 alrededor del eje “Y” segun se necesite durante un procedimiento quirurgico dado (FIG. 3 y 8).
Un accionador o una pluralidad de accionadores (no se muestran) preferentemente pasan a traves de la parte de conector de eje 20c, adaptador de tubo 40 y bloque de giro 50 y conecta operativamente con el conjunto de herramienta 100 para permitir al cirujano articular el conjunto de herramienta 100 alrededor de los ejes “Y” y “Z” segun se necesite durante un procedimiento quirurgico. Ademas, el eje 20 de la grapadora quirurgica 1 es giratorio 360° mediante la rotacion del mando “K”. Como resultado, el conjunto de herramienta 100 es articulable al menos 90 grados en todas las direcciones. Varios accionadores, conjuntos de mano y bloques de giro se preven los cuales se pueden utilizar para consumar esta tarea algunos de los cuales se identifican en las Pat. de U.S. de propiedad conjunta N° 6.250.532 y 6.330.965.
Como se ve mejor en las FIG. 1B y 2 y como se menciono anteriormente, el conjunto de herramienta 100 incluye el conjunto de yunque 110 y el conjunto de canal 120. El conjunto de canal 120 soporta el conjunto de cartucho de grapas 200, un accionador, por ejemplo, un miembro de sujecion dinamico 150, y un patm de arrastre 160. Como tal, estos diversos conjuntos y sus respectivos componentes internos, cuando se ensamblan, cooperan para permitir al conjunto de herramienta manipular, agarrar, afianzar, fijar y, preferentemente, cortar el tejido 400 durante un procedimiento quirurgico dado como se explica mas adelante.
Generalmente, las mitades de la parte superior y del fondo de una parte del conjunto de herramienta 100 se definen por el conjunto de yunque 110 y el conjunto de canal del cartucho 120. El conjunto de cartucho de grapas 200 se monta dentro del conjunto de canal 120 e incluye una superficie de contacto o de enfrentamiento del tejido superior 231 la cual se opone a una superficie del yunque del fondo de contacto o enfrentamiento del tejido 114b del conjunto de yunque 110. Como se ve mejor en la FIG. 1B, el conjunto de yunque 110 y el conjunto de canal 120 (y, de esta manera, cuando se monta, el conjunto de cartucho de grapas 200) se acoplan giratoriamente cerca del extremo proximal del conjunto de herramienta 100 para permitir al conjunto de yunque 110 girar con respecto al conjunto de de canal 120 (y el conjunto de cartucho de grapas 200). Mas concretamente, el conjunto de yunque 110 y el conjunto de canal 120 se acoplan giratoriamente uno con respecto al otro mediante dos elementos mecanicos, a saber, las pestanas que se extienden hacia arriba 121a y 121b del conjunto de canal 120 y el collar de pre-sujecion 140.
Mas concretamente, el extremo proximal de cada pestana que se extiende hacia arriba o pared lateral 121a y 121b del conjunto de canal 120 incluye un recorte, por ejemplo, el fondo de saco 123a, 123b, que se configuran para recibir giratoriamente un par de salientes o topes 119a (no se muestran) y 119b correspondientes que se extienden lateralmente desde el extremo proximal del conjunto de yunque 110. Esto permite al conjunto de yunque 110 girar con respecto al conjunto de canal 120.
El collar de pre-sujecion 140 esta disenado para abarcar y afianzar o preferentemente pre-afianzar el conjunto de canal 120 y el conjunto de yunque 110 juntos en una posicion aproximada y de fijacion anterior al cierre del tejido. Como se puede apreciar, moviendo el collar de pre-sujecion 140 distalmente el usuario puede accionar/mover el conjunto de yunque 110 desde una primera posicion, abierta hacia el conjunto de canal 120 para aproximar las mordazas, es decir, el yunque 110 y el cartucho 200, a una segunda posicion, cerrada para agarrar el tejido 400 entre medias. El patm de arrastre 160 se puede accionar por el usuario para grapar y mas tarde incidir el tejido 400. Los detalles del patm de arrastre 160, el miembro de sujecion dinamico 150 y el conjunto de cartucho de grapas 200 se describen en mas detalle mas adelante. Pre-afianzar se entiende que significa que el collar de sujecion 140 aproxima y afianza los conjuntos de yunque y de cartucho desde o en las partes extremas proximales antes del
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grapado y antes de que el miembro de sujecion dinamico 150 (o 150”) afiance progresivamente mas tarde los conjuntos de yunque y de cartucho en el area de grapado y preferentemente que corte el tejido segun el miembro de sujecion dinamico se traslada a traves del conjunto de herramienta 100.
Como se ve mejor en las FIG. 7A, 7C, 11B y 11D, el patm de arrastre 160 incluye un par de cunas de leva que se extienden hacia arriba 161a, 161b (Ver la FIG. 7A) el cual, cuando se accionan para moverse por el usuario, proporciona una serie de cierres quirurgicos 500 o grapas (Ver la FIG. 11D) dentro y a traves del tejido 400 (FIG. 11B) y contra las bolsas que forman las grapas 111 del conjunto de yunque 110 para deformar los cierres 350 y cerrar el tejido 400 con ello. El miembro de sujecion dinamico 150 esta montado en y se sube con el patm de arrastre 160.
Como se muestra, el miembro de sujecion dinamico 150 se dispone o asienta en el patm de arrastre 160 detras de las cunas que se extienden hacia arriba 161a y 161b de manera que despues de que se disparen los cierres quirurgicos 500 y se forman contra la superficie del fondo del yunque 114b, el miembro de sujecion dinamico 150 corta el tejido 400 entre las dos filas de cierres 500. Detalles de los diversos subconjuntos y componentes anteriormente mencionados del conjunto de herramienta 100 y los rasgos de intercooperacion entre todos los mismos se describen en mas detalle mas adelante con respecto a los dibujos de la figura correspondiente.
Como se muestra en las FIG. 1B, 2, 4, 5, 6A y 11B, el conjunto de yunque 110 preferentemente es alargado e incluye un extremo proximal 116, un extremo distal 118 y las superficies superior e inferior 114a y 114b, respectivamente. Como se explico anteriormente, un par de pasadores de balancm 119a (no se muestra) y 119b se disponen cerca del extremo proximal 116 y se disenan para enganchar giratoriamente con el par correspondiente de recortes 123a y 123b definidos entre las paredes laterales 121a, 121b cerca del extremo proximal del conjunto de canal 120. Se contempla que el accionamiento por medios convencionales (por ejemplo, activado remotamente, por ejemplo, mediante un conjunto de mango 5 (FIG. 1A)) provocara al collar de sujecion 140 moverse en una direccion distal y enganchar la superficie de leva delantera 115 del conjunto de yunque 110. Esto provocara al conjunto de yunque 110 girar desde una primera posicion abierta en la que el conjunto de yunque 110 y el conjunto de canal 120 estan dispuestos en relacion separada uno en relacion con el otro con una segunda posicion cerrada en la que el conjunto de yunque 110 y el conjunto de cartucho de grapas 120 cooperan para agarrar el tejido 400 entre medias, es decir, pre-afianzar el tejido entre la superficie de enganche del tejido 114b del yunque y la superficie de enganche del tejido opuesta 231 del conjunto de cartucho de grapas 200.
Mas concretamente, se preve que el agarre o pre-sujecion inicial del tejido esencialmente presione o fuerce los fluidos lateralmente y axialmente desde el tejido 400 reduciendo de esta manera la probabilidad de que las grapas sean desplazadas hidraulicamente durante la deformacion de las grapas. El movimiento del collar de sujecion 140 proximalmente sobre la superficie de leva proximal 117 girara el conjunto de yunque 110 alrededor de los pasadores 119a, 119b para abrir el conjunto de yunque 110 en relacion con el conjunto de cartucho de grapas 200. De acuerdo con esta revelacion el agarrado, es decir, la sujecion del tejido por el collar de sujecion 140 se conoce como pre- sujetar el tejido, es decir, antes de que el miembro de sujecion dinamico afiance mas tarde, preferentemente, afiance o comprima ademas, el tejido.
Preferentemente, un conjunto de yunque 110 se hace de un material de grueso calibre adecuado tal como, por ejemplo, acero inoxidable quirurgico 301 (u otro material de alta resistencia y duradero) para resistir las fuerzas de expulsion de las grapas y la formacion contra la superficie del fondo del yunque 114b y especialmente en la parte extrema distal del conjunto de yunque 110, y para resistir las fuerzas asociadas con la expansion del tejido y/o flujo de fluido dentro del tejido durante la pre-sujecion del collar de sujecion de 140 y la sujecion posterior por el miembro de sujecion dinamico 150, 150” asf como durante los procesos de cierre y corte. El uso del material de grueso calibre para el conjunto de yunque 110 permite que la apertura 154 y el pasador de leva 159 del miembro de sujecion dinamico 150 revelado ahora sean posicionados ventajosamente en registro considerable vertical con la pestana inferior 152 del conjunto de sujecion 150.
Como se muestra en la FIG. 14, el material de grueso calibre del conjunto de yunque 110 permite que sea utilizado un miembro de sujecion dinamico diferente mejorado 150” (o miembro de sujecion dinamico 150 de la FIG.10). El diseno del miembro de sujecion dinamico 150” reduce mucho cualquier tendencia del conjunto de sujecion 150 de pandearse debido a las fuerzas de compresion y tension opuestas dado que como se muestra en la FIG. 14, hay solamente esfuerzo de tension a lo largo de la lmea “S” debido a la pestana del fondo 152” y el pasador de leva superior 159 (Ver la FIG. 10) en la apertura 154” que se dispone en registro considerable vertical uno en relacion con el otro.
Como resultado y como se ilustra mejor mediante las FIG. 4 y 11B, durante la traslacion distal del miembro de sujecion dinamico 150 o 150” a traves del tejido 400, la combinacion del material de grueso calibre del conjunto de yunque 110 y la alineacion considerablemente vertical de la pestana 152, el borde de la cuchilla 155 y el pasador de leva 159 dispuestos en la apertura 154 operan para aproximar ademas (es decir, afianzar ademas) las superficies de enganche de tejido opuestas (es decir, la superficie del fondo del yunque 114b y la superficie de enfrentamiento superior 231 del conjunto de cartucho de grapas 200) en un punto que se mueve que es distal al borde de ataque 155 de la cuchilla 155a. La sujecion adicional del tejido distalmente con respecto al miembro de sujecion dinamico 150 de translacion actua para mantener un hueco aceptable maximo entre la superficie opuesta 114b y 231 y fuerza
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al fluido desde el tejido 400 que mejora el grapado y reduce la probabilidad de desplazar hidraulicamente las grapas 500 durante la deformacion.
Tambien se preve que la utilizacion de un material de grueso calibre tanto para el conjunto de yunque 110 como el collar de pre-sujecion 140 tambien proporcionara una presion de sujecion mejorada a lo largo de la longitud del tejido 400 y ayudara a proporcionar un hueco uniforme entre el conjunto de yunque 110 y cartucho 200 aproximado respectivo anterior a disparar la grapadora y trasladar el patm de arrastre 160 y el miembro de sujecion dinamico 150 a traves del tejido 400. Ademas, la utilizacion del collar de pre-sujecion 140 para pre-afianzar el tejido 400 anterior a la deformacion de las grapas 500, tambien tiende a forzar algun fluido del tejido distalmente y axialmente externamente que reduce de nuevo la probabilidad de desplazar hidraulicamente las grapas 500 durante la deformacion para cerrar el tejido 400.
Despues de que se cierra y corta el tejido 400 (como se explica en mas detalle mas adelante con respecto a la operacion del miembro de sujecion dinamico 150), el operador puede liberar el collar de pre-sujecion 140 a traves de la reactivacion o activacion inversa del accionador de sujecion (no se muestra). Como se explico anteriormente, el operador acciona el accionador de sujecion para mover el collar de pre-sujecion 140 proximalmente contra la superficie de leva trasera 117 la cual, a su vez, fuerza el conjunto de yunque 110 a girar a una posicion abierta alrededor de los pasadores de balancm 119a y 119b.
Como se muestra mejor en la FIG. 5, el conjunto de yunque 110 incluye un canal o ranura transversal alargada o en forma de T generalmente designado 112 que tiene una parte o pata central dependiente 112a y una parte superior transversal 112b. La ranura 112 preferentemente se extiende longitudinalmente desde el extremo proximal 113 de la parte superior 114a del conjunto de yunque 110 al extremo distal 118 de la misma. La pata 112a comienza desde o entra en el extremo proximo 113 del conjunto de yunque 110 y se extiende hasta el extremo distal 118 y la parte transversal superior 112b comienza en la leva proxima 115 y se extiende al extremo distal 118. Preferentemente, la parte superior 112b se dimensiona para recibir deslizablemente la pasador transversal 159 que se extiende dentro de la apertura 154 en la parte superior 157 del soporte o extension central 157 del miembro de sujecion dinamico 150 (ver la FIG. 10). La pasador 159 se dimensiona para bloquear deslizablemente la parte superior 157 del miembro de sujecion dinamico 150 dentro del canal en forma de T 112 de manera que el miembro de sujecion dinamico 150 es colocable longitudinalmente dentro de la ranura 112.
Como se menciono anteriormente, la adaptacion del pasador 159 y del canal 112 del miembro de sujecion dinamico 150 en el conjunto de yunque 110 y la adaptacion de la pestana inferior a traves de la ranura 126 en el conjunto de canal 120 (FIG. 6B) asegura que el miembro de sujecion dinamico 150 y su hoja de cuchilla se desplacen entre los cierres quirurgicos 500 a lo largo de un plano de corte transversal y vertical ideal a traves del tejido 400. Es decir, las adaptaciones del pasador 159 de la ranura 112 y de la pestana 152 de la ranura 126 impiden al miembro de sujecion dinamico 150 sesgar, es decir, desplazar lateralmente el conjunto de yunque 110 con respecto al conjunto de cartucho de grapas 200 (o bien verticalmente (eje “Z”) o bien transversalmente (eje “Y”)) durante los procesos de cierre o de corte. Ademas y como se explico anteriormente, estas adaptaciones tambien contrarrestan las fuerzas de sujecion asociadas con la compresion del tejido en el hueco entre el conjunto de yunque 110 y el conjunto de cartucho 120 y la expulsion y deformacion de las grapas 500 para mantener el conjunto de yunque 110 y el conjunto de cartucho de grapas 200 en relacion considerablemente uniforme y proxima uno en relacion con el otro durante la deformacion progresiva, secuencial de las grapas 500 y la incision del tejido 400 segun se mueve el miembro de sujecion dinamico 150 desde los extremos proximal a distal del conjunto de yunque 110, conjunto de canal 120 o conjunto de cartucho 200.
Como se muestra mejor en las FIG. 6A, 6B, 11A y 11B, el conjunto de canal 120 se dimensiona para alojar el conjunto de cartucho de grapas 200 allf dentro. Mas concretamente, el conjunto de canal 120 incluye una superficie del fondo 128 que tiene paredes o pestanas laterales 121a y 121b que se extienden hacia arriba las cuales definen el canal de soporte alargado 125 el cual, a su vez, se dimensiona para recibir engastadamente el conjunto de cartucho de grapas 200 allf dentro. El conjunto de canal 120 tambien incluye una pluralidad de interfaces mecanicas, aqrn las aperturas 127a, 127b, 127c y 127d, las cuales reciben coincidentemente una correspondiente pluralidad de interfaces mecanicas, aqrn, los salientes 235a, 235b, 235c y 235d, dispuestos en las superficies de enfrentamiento exteriores del conjunto de cartucho de grapas 200 (FIG. 2 y 11C).
El conjunto de cartucho de grapas 200 se puede ensamblar y montar dentro del conjunto de canal 120 durante el proceso de fabricacion o montaje y vender como parte del conjunto de herramienta total 100, o el conjunto de cartucho de grapas 200 se puede disenar para el montaje selectivo al conjunto de canal 120 segun se necesite y vender separadamente, por ejemplo, como un conjunto de cartucho de grapas 200 sustituible o desechable, de reposicion de un solo uso. Preferentemente, el conjunto de cartucho de grapas 200 se fabrica para incluir el patm de arrastre 160 y el miembro de sujecion dinamico 150. Alternativamente y como se trata mas adelante con respecto a la FIG. 15, el miembro de sujecion dinamico 150 con una cuchilla se puede vender como parte del conjunto de cartucho de grapas 200 reemplazable sin una hoja de cuchilla 155a (pero preferentemente con una hoja de cuchilla 155a para mejorar y/o asegurar el corte preciso del tejido 400 despues de la deformacion de la grapa. El conjunto de herramienta 100 tambien se puede vender como un lote que incluye una variedad de cartuchos de grapas 200 que contienen cierres quirurgicos 500 de diferentes tamanos, y/o disponer para ser expulsados en diferentes patrones, cualquiera de los cuales se puede acoplar selectivamente al conjunto de canal 120 como se desee para usar
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durante una operacion particular.
El extremo proximal de cada pestana que se extiende hacia arriba 121a y 121b del conjunto de canal 120 incluye los fondos de saco 123a, 123b anteriormente mencionados los cuales permiten a los pasadores 119a y 119b del conjunto de yunque 110 girar allf dentro, y las aperturas 122a y 122b las cuales se dimensionan para recibir el pasador de giro 59. Cuando se ensambla, el pasador de giro 59 tambien pasa a traves de las aperturas 53a, 53b del bloque de giro 50 a lo largo del eje “Y”. La rotacion del bloque de giro 50 alrededor del eje “Y” gira en consecuencia el conjunto de herramienta 100 alrededor del eje “Y”. La rotacion del bloque de giro 50 alrededor del pasador 57 a lo largo del eje “Z” gira el conjunto de herramienta 100 alrededor del eje “Z”.
Como se muestra mejor en la FIG. 6B, la superficie del fondo 128 del conjunto de canal 120 tambien incluye una ranura longitudinal alargada 126 que incluye y comunica en su extremo proximal con un recorte o muesca 129.La muesca 129 se dimensiona para permitir a la pestana del fondo 152 del miembro de sujecion dinamico 150 pasar a traves de la misma. La parte mas estrecha de la ranura 126 se dimensiona para recibir de manera deslizable y permitir al soporte o extension hacia arriba 151 pasar a traves de la misma. Mas concretamente y como tambien se muestra en las FIG. 7A y 7B, la pestana del fondo 152 del miembro de sujecion dinamico 150 se pasa a traves de la apertura o canal 164 a traves del recorte o la muesca 167 en la base del patm de arrastre 160, y a traves de la muesca 129 en la pared del fondo 128 del conjunto de canal 120. Cuando la pestana del fondo 152 del miembro de sujecion dinamico 150 se extiende por debajo de la superficie de la pared del fondo 128 del canal 120, el miembro de sujecion dinamico 150 se mueve distalmente de manera que la pestana del fondo 152 engancha deslizablemente la parte inferior de la ranura adyacente 126 de la pared del fondo 128 y la extension hacia arriba 151 engancha en el canal 164. Como se puede apreciar, esto bloquea de manera deslizable la pestana del fondo 152 del miembro de sujecion dinamico 150 y el patm de arrastre 160 dentro del conjunto de canal 120.
La pestana del fondo 152 del miembro de sujecion dinamico 150 en cooperacion con la adaptacion del pasador 159 y la ranura 112 del miembro de sujecion dinamico 150 y el conjunto de yunque 110, asegura deslizablemente el miembro de sujecion dinamico 150 dentro de las ranuras opuestas 126 y 112 e impide el desplazamiento no intencionado del conjunto de yunque 110 en relacion con el conjunto de cartucho de grapas 200 (o bien verticalmente (eje “Z”) o bien transversalmente (eje “Y”)) durante los procedimientos de sujecion, cierre y corte. Como se menciono anteriormente, el material de grueso calibre del conjunto de yunque 110 tambien reduce el desplazamiento no intencionado del miembro de sujecion dinamico 150 durante la traslacion distal del mismo. De esta manera, ademas de cortar el tejido 400, el miembro de sujecion dinamico 150 de la presente revelacion tambien actua para oponerse a las fuerzas asociadas con la compresion del tejido, la deformacion de los cierres quirurgicos 500 y el corte del tejido 400.
Como se menciono anteriormente, la superficie del fondo 128 del conjunto de canal 120 actua como un portador para definir el canal de soporte alargado 125 para recibir el conjunto de cartucho de grapas 200. Con respecto al conjunto de cartucho de grapas 200, las lenguetas correspondientes 235a, 235b, 235c, 235d formadas a lo largo del conjunto de cartucho de grapas 200 y el canal de soporte alargado 125 funcionan para retener el conjunto de cartucho de grapas 200 dentro del canal de soporte 125 (Ver la FIG. 11C). El conjunto de cartucho de grapas 200 tambien incluye ranuras de retencion desplazadas 225 para recibir una pluralidad de cierres 500 y empujadores de grapas 228 allf dentro. Una serie de ranuras longitudinales separadas 230 se extienden a traves del conjunto de cartucho de grapas 200 para acomodar un par de cunas de leva bifurcadas, que se extienden hacia arriba 161a, 161b del patm de arrastre 160. Como se muestra mejor en la FIG. 11A, una ranura longitudinal, situada centralmente 282 se extiende considerablemente a lo largo de la longitud del conjunto de cartucho de grapas 200 para facilitar el paso de la extension hacia arriba 151 del miembro de sujecion dinamico 150 a traves de la misma. Cuando se deforman usando la realizacion mostrada, los cierres quirurgicos 500 forman dos conjuntos de tres filas de grapas 232a y 232b, un conjunto a cada lado de la ranura 282.
Cuando el miembro de herramienta 100 se ensambla, el patm de arrastre 160 se situa deslizablemente entre el conjunto de cartucho de grapas 200 y el conjunto de canal 120 (Ver la FIG. 3). El patm de arrastre 160 y los componentes de funcionamiento interior del conjunto de cartucho de grapas 200 detallados anteriormente cooperan operativamente para deformar las grapas 500. Mas concretamente, el patm de arrastre 160 incluye las cunas de leva bifurcadas, que se extienden hacia arriba 161a y 161b las cuales se enganchan y cooperan con una serie de empujadores de grapas 228 para conducir las grapas 350 hasta las ranuras 225 desde el conjunto de cartucho 200 y se deforman contra las bolsas que forman las grapas 11 del conjunto de yunque 100.
Durante el funcionamiento de la grapadora quirurgica 10, el patm de arrastre 160 se traslada preferentemente distalmente hasta las ranuras longitudinales 230 del conjunto de cartucho de grapas 200 para avanzar las cunas de leva 161a y 161b en contacto secuencial con los empujadores 228, para proporcionar y provocar a los empujadores 228 trasladarse verticalmente dentro de las ranuras de retencion 225 e incitar los cierres 500 de las ranuras de retencion 225 contra las bolsas que forman los cierres 111 en la superficie de enfrentamiento del fondo 14b del conjunto de yunque 110 (Ver la FIG. 4). Uno de tal tipo de bolsa o cavidad que da forma a la grapa 111 se muestra y describe en la Pat. de U.S. de propiedad conjunta N° 6.330.965.
Como se menciono anteriormente, el miembro de sujecion dinamico 150 se monta en y se sube en el patm de arrastre 160 (FIG. 7A y 7B). En la realizacion mostrada, cuando se ensambla, la parte inferior de la extension hacia
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arriba 151 del miembro de sujecion dinamico 150 se situa generalmente en la ranura 164 definida en el patm de arrastre 160 axialmente entre el borde de enfrentamiento proximalmente 166a del espaciador 166 y el borde de enfrentamiento distalmente 162b y el borde proximal que se extiende hacia arriba 162a de una pestana trasera 162.
El miembro de sujecion dinamico 150 se asegura al patm de arrastre 160 a traves de una ranura 167 que se extiende hasta la base del patm de arrastre 160. Mas concretamente, la base de extension hacia arriba 151 del miembro de sujecion dinamico 150 se dispone de manera segura con la segunda ranura 167 que se extiende hasta el fondo del patm de arrastre 160 y se define por el borde de enfrentamiento o posterior proximalmente 166b de un espaciador 166 y el borde distal 162b de la pestana 162. Espedficamente, el borde de ataque 153a (FIG. 10) de la extension superior 151 se apoya contra el borde posterior del espaciador 166b y el borde posterior 153b (FIG. 10) de la extension superior 151 se apoya contra el borde distal 162b de la pestana 162 para asegurar axialmente el miembro de sujecion dinamico 150 con y axialmente en el patm de arrastre 160.
El borde de ataque 166a del espaciador 166 se monta dentro y a lo largo de la ranura 282 del conjunto de cartucho de grapas 200 para guiar positivamente el patm de arrastre 160 a lo largo de un camino de grapado y corte ideal preferentemente centralmente y axialmente a traves del tejido 400. De esta manera, tras el movimiento distal del patm de arrastre 160 para expulsar los cierres quirurgicos 500, el miembro de sujecion dinamico 150, dispuesto de manera de segura dentro del patm de arrastre 160, se desplaza a lo largo de la ranura 282 del conjunto de cartucho de grapas 200 y corta secuencialmente el tejido 400 entre las dos filas 232a y 232b de los cierres formados 500 (Ver la FIG. 11A). Como se explica en mas detalle mas adelante con respecto a las FIG. 12 y 13, el extremo distal del patm de arrastre 160 puede incluir las aperturas 169a y 169b para recibir un miembro flexible alargado adecuado, por ejemplo, un cable 900, el cual tras el movimiento del mismo avanza el patm de arrastre 160 para formar los cierres quirurgicos 500 y cortar el tejido 400.
Como se muestra mejor en la FIG. 10, el miembro de sujecion dinamico 150 incluye una parte superior 157 que tiene una apertura transversal 154 con un pasador 159 montable o montado allf dentro, un soporte central o extension hacia arriba 151 y la pestana del fondo considerablemente en forma de T 152 la cual, como se describio anteriormente, coopera mutuamente para retener deslizablemente el miembro de sujecion dinamico 150 a lo largo de un camino de corte ideal durante el movimiento longitudinal, distal del patm de arrastre 160. El borde de corte de ataque 155, aqrn, la hoja de cuchilla 155a, se dimensiona para montarse dentro de la ranura 282 del conjunto de cartucho de grapas 200 y separar el tejido 400 una vez grapado. Se preve que el borde de ataque 155 del miembro de sujecion dinamico 150 pueda ser en sierra, biselado o con muescas para facilitar el corte del tejido. Mas concretamente, se contempla que la combinacion de la fuerza de cierre aumentada como resultado del material de grueso calibre del conjunto de yunque 110 junto con el anteriormente descrito miembro de sujecion dinamico 150 (o miembro de sujecion dinamico 150” de la FIG. 14) disenado o situado unico permita el corte preciso del tejido 400 cuando el borde de ataque 155 avanza a traves del tejido 400. Tambien se entiende que el miembro de leva superior no necesita ser un pasador sino que puede ser cualquier superficie(s) de leva que sobresale(n) exteriormente adecuada(s) integral(es) o extrafble(s). Lo mismo aplica a la pestana del fondo 152 que puede ser cualquier superficie de leva adecuada, que incluye un pasador o un pasador extrafble, un boton para facilitar el montaje del miembro de sujecion dinamico en el patm de arrastre 160 o el conjunto de canal 120.
Tambien se preve que la resistencia de la configuracion sobre y bajo la leva del miembro de sujecion dinamico 150 en combinacion con la resistencia aumentada del conjunto de yunque 110 (es decir, hecha de un acero inoxidable quirurgico de grueso calibre) tambien impide al miembro de sujecion dinamico 150 cortar verticalmente fuera de la lmea o pandear y elimina la necesidad del miembro de sujecion dinamico 150 en cantilever segun se mueve a traves del tejido 400. En otras palabras, mediante la utilizacion preferentemente de un material de grueso calibre para el conjunto de yunque 110 (y posiblemente el conjunto de canal 120) y la utilizacion de superficies de enganche de deslizamiento superior e inferior considerablemente alineadas del miembro de sujecion dinamico 150 (aqrn, el pasador 159 y la pestana del fondo 152) para montar entre el conjunto de yunque 110 y el conjunto de canal 120 en un registro vertical considerable, las fuerzas normales asociadas con el grapado y corte del tejido 400 son suficientemente opuestas manteniendo de esta manera un hueco maximo consistente y considerablemente uniforme en el area de grapado y corte entre las superficies de contacto del tejido opuestas (es decir, la superficie del cartucho de grapas 231 y la superficie del yunque del fondo 114b) durante los procesos de grapado y corte. Ademas, el suministro del material de grueso calibre para el conjunto de yunque 110 y la adaptacion del pasador 159 y la pestana del fondo 152 tambien funciona para aproximar ademas o afianzar ademas el tejido en un punto distal al miembro de sujecion dinamico 150 que fuerza al fluido del tejido 400 a mejorar ademas los procesos de grapado y corte. Se preve que se puedan emplear superficies de leva deslizantes superior e inferior alternativas para lograr un proposito similar, por ejemplo, placas, carriles, rodamientos de bolas etc.
A partir de lo anterior y con referencia a los diversos dibujos de las figuras, aquellos expertos en la tecnica apreciaran que tambien se pueden hacer ciertas modificaciones a la presente revelacion sin salirse del alcance de la presente revelacion. Por ejemplo, el conjunto de herramienta 100 anteriormente descrito puede ser parte de o incorporado en una unidad de carga desechable (DLU) tal como la revelada en la Pat. de U.S. N° 6.330.965 o unido directamente al extremo distal de cualquier dispositivo de grapado quirurgico conocido. Un conjunto de mango para accionar el(los) miembro(s) de aproximacion se puede seleccionar de una variedad de mecanismos de accionamiento que incluyen palancas, mandos giratorios o deslizables, levas o disparadores giratorios, y cualquier combinacion de los mismos. Tambien se preve el uso del conjunto de herramienta 100 anteriormente descrito como
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parte de un sistema robotico.
Tambien se preve que se puedan emplear muchos accionadores diferentes para avanzar el patm de arrastre 160 a traves del tejido 400. Por ejemplo, se preve que el conjunto de herramienta 100 (o uno de los subconjuntos asociados con el, es decir, el conjunto de canal l20 o el conjunto de cartucho de grapas 200 o el conjunto de yunque 110) pueda incluir una o mas poleas para avanzar el patm de arrastre 160 a traves del tejido 400 para grapar y cortar el mismo.
Por ejemplo, como se muestra en la FIG. 12a, un par de cables, cuerdas, hilos o bandas o correas 700a, 700b se pueden alimentar distalmente a traves del conjunto de cartucho 200 o el conjunto de canal 120 a traves o alrededor de los respectivos pasadores, cabestrantes, o poleas 600a, 600b, y pasar proximalmente hacia y unirse al patm de arrastre 160. Alternativamente y como se muestra en la FIG. 12B, una correa unica puede sustituir las correas 700a y 700b y se puede pasar a traves de las aperturas 169a y 169b en el extremo distal del patm de arrastre 160, o pasar dentro de un hueco 163 y por detras de un pasador 610 el cual se monta a traves de las aperturas 169a y 169b.
Uno o mas pasadores 610 se pueden disponer dentro del patm de arrastre 160 de manera que una fuerza proximal “F” en las bandas correspondientes 700a y 700b avanza el patm de arrastre 160 distalmente para expulsar y dar forma a las grapas 500 contra el conjunto de yunque 110 y cortar el tejido 400. Se preve que la banda o las correas se puedan hacer de un material de alta resistencia vendido bajo la marca registrada Kevlar® u otras fibras o materiales sinteticos disponibles para uso generalizado en las tecnicas industriales y adecuado para este uso quirurgico previsto. Como se puede apreciar, utilizar un sistema de pasador o polea doble como se muestra esquematicamente en la FIG. 12 mantiene el equilibrio de las fuerzas accionadas proximalmente “F” en cualquiera de los dos lados del conjunto de cartucho de grapas 200 segun el patm de arrastre 160 se mueve a traves del tejido 400. Como tambien se puede apreciar, esto asegura el grapado y corte uniforme y consistente del tejido 400 mediante el miembro de sujecion dinamico 150.
La FIG. 13 muestra un sistema de accionamiento adecuado posible para accionar el collar de pre-sujecion 140 para forzar el conjunto de yunque 110 a acercarse con respecto al conjunto de cartucho de grapas 200. Mas concretamente, un cable 900 se puede utilizar para mover el collar de pre-sujecion 140 distalmente encima de y sobre la superficie de leva 115 para acercar el yunque 110 en relacion al conjunto de cartucho de grapas 200 y comprimir el tejido 400. Preferentemente, el cable 900 se une al collar de pre-sujecion 140 en o cerca del punto 149 y se alimenta a traves de un pasillo en el conjunto de yunque 110 (o bajo una parte proximal del conjunto de yunque 110) y se alimenta proximalmente a traves del eje 20. El accionamiento del cable 900 en la direccion “C” fuerza el collar de pre-sujecion 140 distalmente contra la superficie de leva 115 para acercar el conjunto de yunque 110 en relacion con el conjunto de cartucho de grapas 200. Se puede emplear un mecanismo de retorno, por ejemplo, un sistema de resorte, cable o similar (no se muestra), para devolver el collar de pre-sujecion 140 a una orientacion de pre-sujecion la cual vuelve a abrir el conjunto de yunque 110.
La FIG. 14 muestra una realizacion alternativa de un collar de sujecion dinamico 150” que incluye una parte superior 157” que tiene una apertura transversal 154 dentro de la cual el pasador 159 es montable o se monta allf dentro, la extension hacia arriba 151 y la pestana del fondo considerablemente en forma de T 152” la cual, como se describio de manera similar anteriormente con respecto a la FIG. 10, coopera mutuamente para retener deslizablemente el miembro de sujecion dinamico 150” a lo largo de un camino de corte ideal durante el movimiento longitudinal, distal del patm de arrastre 160. El borde de corte de ataque 155” de la hoja de cuchilla 155a” se dimensiona para montarse dentro de la ranura 282 del conjunto de cartucho de grapas 200 y separar el tejido 400 una vez grapado.
Se preve que la combinacion de la fuerza de cierre mejorada como resultado del material de grueso calibre del conjunto de yunque 110 junto con el miembro de sujecion dinamico 150” disenado unicamente permita el corte preciso del tejido 400 cuando el borde de ataque 155” se avanza a traves del tejido 400. Tambien se contempla que la resistencia de la configuracion por encima y por debajo de la leva del miembro de sujecion dinamico 150” en combinacion con la resistencia aumentada del conjunto de yunque 110 (es decir, hecho de un acero inoxidable quirurgico de gran calibre) tambien impida al miembro de sujecion dinamico 150” cortar verticalmente fuera de la lmea o pandearse y elimina la necesidad del miembro de sujecion dinamico 150” de cantilever segun se mueve a traves del tejido 400. En otras palabras, utilizando preferentemente un material de gran calibre para el conjunto de yunque 110 que alinea considerablemente las superficies de enganche de manera deslizable superior e inferior en registro vertical, el miembro de sujecion dinamico 150” se monta entre el conjunto de yunque 110 y el conjunto de canal 120 en registro vertical considerable y las fuerzas asociadas con el grapado y corte del tejido 400 son suficientemente opuestas manteniendo de esta manera un hueco maximo consistente y considerablemente uniforme en el area de grapado y corte entre las superficies de contacto del tejido opuestas 231 y 114b durante los procesos de grapado y corte.
El miembro de sujecion dinamico 150, 150” de esta revelacion es una mejora sobre los miembros de sujecion conocidos. Dado que las superficies de leva superior e inferior son considerablemente opuestas, es decir, alineadas considerablemente de manera vertical, las fuerzas a las cuales se somete durante su funcionamiento son considerablemente fuerzas de tension solamente. Consecuentemente, el diseno del miembro de sujecion dinamico 150 lo hace significativamente fuerte y significativamente resistente para pandearse. Por consiguiente, el borde de
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corte 155 es improbable que se pandee. Ademas, dado que el borde de corte 155 para cortar el tejido se alinea tambien considerablemente con las superficies de leva superior e inferior 159 y 152, la fuerza de cierre del miembro de sujecion dinamico 150 se imparte mas cercana a y preferentemente mas alineada con el borde de corte. Esto mejora la accion de corte del borde de corte.
El uso preferente de un collar de sujecion 140 para pre-afianzar, es decir, aproximar inicialmente el conjunto de yunque 110 y el conjunto de cartucho 200, en combinacion con el uso de un miembro de sujecion dinamico 150 para afianzar posteriormente, preferentemente afianzar ademas, es decir, aproximar ademas, los conjuntos de yunque 110 y cartucho 200, proporciona varias ventajas. Mejora la estabilizacion y compresion del tejido. Durante la pre- sujecion y aproximacion, el collar de sujecion 140 aprieta, es decir, pre-aprieta el tejido, entre y distalmente a lo largo de las superficies de contraccion o enfrentamiento del tejido respectivas del conjunto de yunque 110 y el conjunto de cartucho 120. Durante la sujecion y aproximacion posterior, preferentemente adicional con el miembro de sujecion dinamico 150, se cree que tiene menos fluido y flujo de fluido en el tejido en el area de sujecion adicional. Esto mejora la obtencion de un hueco de tejido uniforme y la mejor formacion de grapa a lo largo del conjunto de herramienta 100. Con menos flujo de fluido en el area de y durante el grapado, las patas de las grapas golpean de manera mas precisa sus bolsas de grapa 111 en la superficie de formacion del yunque 110. Las ventajas de pre- sujecion y posterior sujecion se mejoran ademas mediante el uso del conjunto de yunque 110 de gran calibre mas fuerte, por ejemplo debido a que hay menos tendencia para que el extremo distal del conjunto de yunque 110 se arquee hacia fuera lejos del conjunto de cartucho 200. Tambien, el efecto de apriete en el tejido durante la pre- sujecion y la sujecion es mas pronunciado, cada vez mas desde la mitad al extremo distal del conjunto de yunque 110. Consecuentemente, el fluido del tejido se fuerza ademas distalmente fuera y pasado el extremo distal del conjunto de yunque 110 y el conjunto de herramienta 100. Esto reduce el flujo de fluido en el area de y durante el grapado con el miembro de sujecion dinamico 150. Ademas de los beneficios explicados anteriormente, esto reduce la necesidad de cantilever de la fuerza de leva por delante del miembro de sujecion 150, y permite que la superficie de leva superior aqrn, el pasador 159, este dispuesta de manera efectiva en alineamiento considerablemente vertical lo que significa que al menos alguna parte de las superficies de leva superior e inferior 159, 152 estan alineadas verticalmente. De esta manera, la adaptacion y el procedimiento mas preferente es tener un collar de sujecion 140 para la pre-sujecion, un miembro de sujecion dinamico 150 para sujecion adicional, y cada uno que se efectua sobre un conjunto de yunque 110 fuerte, o, preferentemente, muy fuerte.
La presente revelacion tambien se refiere a un metodo ejemplar de grapado del tejido e incluye los pasos de proporcionar una grapadora que tiene un conjunto de herramienta en un extremo distal de la misma, el conjunto de herramienta que incluye un conjunto de canal para soportar un cartucho de grapas que transporta una pluralidad de grapas y un yunque dimensionado que tiene, por ejemplo, bolsas formadas para deformar la pluralidad de grapas expulsadas desde el cartucho de grapas contra las mismas. El conjunto de herramienta tambien incluye un patm de arrastre el cual es movil desde una primera posicion a una posicion posterior para forzar la pluralidad de grapas desde el cartucho de grapas a traves del tejido y contra el yunque, y un miembro de sujecion dinamico que se mueve con el patm de arrastre. El miembro de sujecion dinamico incluye una primera interfaz mecanica la cual engancha deslizablemente el yunque y una segunda interfaz mecanica que engancha deslizablemente el conjunto de canal. Las primera y segunda interfaces mecanicas del miembro de sujecion dinamico estan en registro considerable vertical una con respecto a la otra para oponer las fuerzas expansivas asociadas con la sujecion, grapado, y si una cuchilla esta enganchada en el miembro de sujecion dinamico, que corta el tejido.
El metodo tambien incluye los pasos de: aproximar y agarrar el tejido entre las superficies opuestas del yunque y el cartucho de grapas; afianzar el yunque y el cartucho de grapas en posicion alrededor del tejido; y disparar la grapadora para avanzar el patm de arrastre y el miembro de sujecion dinamico distalmente para expulsar las grapas desde el cartucho de grapas para deformar contra el yunque para cerrar el tejido y posteriormente cortar el tejido a lo largo de un camino de corte predeterminado. El paso de disparo puede emplear el miembro de sujecion dinamico considerablemente por encima y por debajo para aproximar ademas las superficies opuestas del conjunto de yunque y el cartucho de grapas en puntos que se mueven progresivamente los cuales son distales a la cuchilla durante la traslacion del miembro de sujecion dinamico.
Aunque la grapadora quirurgica de que se trata y varios conjuntos asociados con ella se han descrito con respecto a realizaciones preferidas, sera inmediatamente evidente para los expertos en la tecnica relacionada que se pueden hacer cambios y modificaciones a los mismos sin apartarse del alcance de las reivindicaciones adjuntas.

Claims (7)

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    REIVINDICACIONES
    1. Una grapadora quirurgica que comprende:
    un conjunto de herramienta (100), en donde el conjunto de herramienta comprende: un conjunto de cartucho (200) que transporta una pluralidad de grapas; un conjunto de canal (120) que soporta el conjunto de cartucho en el mismo;
    un conjunto de yunque (110) dimensionado para deformar dicha pluralidad de grapas expulsadas desde dicho conjunto de cartucho contra el mismo;
    un patm (160) movible a traves de dicho conjunto de cartucho (200), dicho patm que tiene cunas de levas (161a, 161b) para forzar a dicha pluralidad de grapas de dicho cartucho de grapas a traves del tejido y contra dicho yunque para grapar el tejido dispuesto entre dicho yunque y dicho cartucho de grapas cuando dicho patm se mueve a traves de dicho conjunto de cartucho desde una primera posicion a una segunda posicion; y
    un miembro de sujecion dinamico (150) movible con dicho patm a traves de dicho conjunto de canal y dicho conjunto de yunque, dicho miembro de sujecion dinamico que tiene una parte superior (157) que tiene una superficie de leva superior (159) que se acopla de manera deslizante a dicho yunque y una parte inferior que tiene una superficie de leva inferior (152) que se acopla de manera deslizante a dicho conjunto de canal, dichas superficies de leva superior e inferior que estan sustancialmente opuestas para oponer las fuerzas expansivas asociadas con la sujecion y el grapado del tejido y para mantener un hueco sustancialmente uniforme entre las superficies de contacto con el tejido de dicho conjunto de yunque y dicho conjunto de cartucho durante el grapado,
    caracterizada por que dicho patm (160) tiene una base con una ranura (167) que se extiende a traves de la misma, dicho miembro de sujecion (150) que se asegura a dicho patm (160) a traves de dicha ranura (167) que se extiende a traves de la base del patm.
  2. 2. La grapadora quirurgica segun la reivindicacion 1, en donde dicho miembro de sujecion dinamico comprende un soporte central (151) y en donde dicha parte inferior esta formada como un reborde inferior en forma de T.
  3. 3. La grapadora quirurgica segun la reivindicacion 2, en donde el soporte central (151) tiene un borde de ataque de corte (155).
  4. 4. La grapadora quirurgica segun la reivindicacion 3, en donde el borde de corte (155) esta sustancialmente alineado con la superficie de leva superior (159) y la superficie de leva inferior (152).
  5. 5. La grapadora quirurgica segun cualquier reivindicacion precedente, en donde el conjunto de yunque (110) esta hecho de material de calibre pesado.
  6. 6. La grapadora quirurgica segun cualquier reivindicacion precedente, en donde el conjunto de herramienta ademas comprende un collar de sujecion movil (140) que se desvfa contra una superficie de leva en dicho conjunto de yunque (110) para cerrar dicho conjunto de yunque (110) respecto a dicho conjunto de cartucho (200) para sujetar el tejido entre los mismos.
  7. 7. La grapadora quirurgica segun cualquier reivindicacion precedente, en donde el conjunto de yunque incluye una ranura en forma de T (112) y la superficie de leva superior del miembro de sujecion dinamico se traslada de manera deslizante dentro de dicha ranura en forma de T.
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